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Scientists had thought people began manipulating fire to create tools in Eur
Scientists had thought people began manipulating fire to create tools in Eur
游客
2023-11-17
31
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问题
Scientists had thought people began manipulating fire to create tools in Europe about 25, 000 years ago. But the new finds suggest that people in【C1】______is now South Africa discovered that heating a stone called silcrete would make it easier to flake, allowing them to shape more 【C2】______ blades, knives, and other tools. These early engineers likely used some of these tools to hunt and butcher wide range of【C3】______, from the aggressive buffalo to the tiny rat.
This sophisticated control【C4】______ fire reflects advanced smarts, and marks the turning point【C5】______we became " uniquely human," said study leader Kyle Brown, an archaeologist at the University of Cape Town. "These people were extremely【C6】______," Brown said. "These are not the【C7】______of the classic cavemen. "
As part of the study, the researchers 【C8】______ the processes the early Africans likely【C9】______ to make the stone tools. Heated over a fire pit, the silcrete flaked and【C10】______a glossy red color.
Such craftsmanship required thinking 【C11】______, a sign of high intelligence, Brown said. People had to【C12】______ firewood, build the fire, work the stone, and then【C13】______the handle to the stone using natural adhesives. " Because(this is)such a sophisticated technology, this is something that would【C14】______ language to【C15】______ to the next generation," he added.
But paleoanthropologist John Shea isn’t convinced by the idea that " heat treating" stone was a sign of the 【C16】______to modern human behavior. " My position is that you shouldn’t 【C17】______ this event—you have to prove it," Shea said.【C18】______, Shea praised the study, saying it will 【C19】______ people to seek out other heat-treated stone tools【C20】______ in the African record. [br] 【C11】
选项
A、ahead
B、after
C、over
D、up
答案
A
解析
动词短语辨析题。制作石器需要很多步骤:拾木材,取火,加工石头……,这当然需要“事先考虑”,故[A]为答案。think over“重新考虑,仔细考虑”;think up“想出,发明,虚构”。
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